Floribunda rose plant named ‘Meimonblan’

ABSTRACT

A new and distinct variety of Floribunda rose plant is provided which very abundantly forms on a remontant basis attractive Marigold Orange blossoms that are relatively stable in coloration. Such blossoms possess no fragrance. The plant exhibits a bushy growth habit, forms very dense medium green and glossy foliage, and possesses very good disease resistance. The new variety is particularly well suited for providing colorful ornamentation in the landscape.

SUMMARY OF THE INVENTION

The new variety of Floribunda rose plant was created by artificialpollination wherein two parents were crossed whigh previously had beenstudied in the hope that they would contribute the desiredcharacteristics. The female parent (i.e., the seed parent) of the newvariety was the product of the cross of the ‘Meidanu’ variety(non-patented in the United States) and the ‘Meichanso’ variety(non-patented in the United States). The male parent (i.e., the pollenparent) was the ‘Korpatri’ variety (non-patented in the United States).The ‘Meichanso’ variety sometimes is known as the ‘Parador’ variety, andthe ‘Korpatri’ variety sometimes is known as the ‘Patricia’ variety. Theparentage of the new variety can be summarized as follows:

(‘Meidanu’×‘Meichanso’)×‘Korpatri’.

The seeds resulting from the above pollination were sown and smallplants were obtained which were physically and biologically differentfrom each other. Selective study resulted in the identification of asingle plant of the new variety.

It was found that the new variety of Floribunda rose plant of thepresent invention possesses the following combination ofcharacteristics:

(a) Forms on a very abundant and remontant basis attractive doubleMarigold Orange blossoms that are relatively stable in coloration.

(b) Exhibits a bushy growth habit,

(c) Forms attractive very dense medium green glossy foliage, and

(d) Is particularly well suited for growing as ornamentation in parksand gardens.

The new variety of the present invention can be readily distinguishedfrom its ancestors. For instance, the ‘Meidanu’ variety forms dark redblossoms while the new variety is shorter in stature and forms MarigoldOrange blossoms. The ‘Meichanso’ variety forms larger blossoms that aregeranium red in coloration. The ‘Korpatri’ variety exhibits a more erectgrowth habit and forms smaller blossoms.

The new variety well meets the needs of the horticultural industry andis particularly well suited for growing in the landscape.

The new variety has been found to undergo asexual propagation in Franceby a number of routes, including budding, grafting, and cuttage. Asexualpropagation by the above-mentioned techniques in France has shown thatthe characteristics of the new variety are stable and are strictlytransmissible by such asexual propagation from one generation toanother.

The new variety has been named the ‘Meimonblan’ variety.

BRIEF DESCRIPTION OF THE PHOTOGRAPH

The accompanying photograph shows as nearly true as it is reasonablypossible to make the same, in a color illustration of this character,typical specimens of the plant parts of the new variety. The rose plantsof the new variety were two years of age and were observed during Junewhile budded on Rosa froebelli understock and growing outdoors at LeCannet des Maures, Var, France. Dimensions in centimeters are indicatedat the bottom of the photograph.

FIG. 1—illustrates a specimen of a young shoot;

FIG. 2—illustrates a spacemen of a floral bud before the opening of thesepals;

FIG. 3—illustrates a specimen of a floral bud at the opening of thesepals;

FIG. 4—illustrates a specimen of a floral bud at the opening of thepetals;

FIG. 5—illustrates a specimen of a flower in the course of opening;

FIG. 6—illustrates a specimen of an open flower—plan view—obverse;

FIG. 7—illustrates a specimen of an open flower—plan view—reverse;

FIG. 8—illustrates a specimen of a fully open flower—plan view—obverse;

FIG. 9—illustrates a specimen of a fully open flower—plan view—reverse;

FIG. 10—illustrates a specimen of a floral receptacle showing thearrangement of the stamens and pistils;

FIG. 11—illustrates a specimen of a floral receptacle showing thearrangement of the pistils (stamens removed);

FIG. 12—illustrates a specimen of a flowering stem;

FIG. 13—illustrates a specimen of a main branch;

FIG. 14—illustrates a specimen of a leaf with three leaflets—planview—upper surface;

FIG. 15—illustrates a specimen of a leaf with five leaflets—planview—under surface;

FIG. 16—illustrates a leaf with seven leaflets—plan view—upper surface;and

FIG. 17—illustrates a specimen of a cluster of buds.

DETAILED DESCRIPTION

The chart used in the identification of the colors is that of The RoyalHorticultural Society (R.H.S. Colour Chart). The description is based onthe observation of two year-old plants during June while budded on Rosafroebelli understock and growing outdoors at Le Cannet des Maures, Var,France. The coloration in common terms precedes reference to the chartin some instances.

Class: Floribunda.

Plant:

Height.—Approximately 65 to 75 cm on average at the end of the growingseason.

Habit.—Bushy.

Branches:

Color.—Young stems: near Yellow-Green Group 144A. Adult wood: nearYellow-Green Group 146C.

Thorns.—Size: Large (as illustrated), and commonly measure approximately0.8 to 1 cm in length on average on mature stems and approximately 0.6to 0.8 cm in length on average on immature stems. Quantity: moderatelynumerous (as illustrated). Color: near Greyed-Orange Group 166B on youngstems and adult wood. Shape: rather flat and elongated on upper surfaceand slightly concave on the under surface.

Leaves:

Stipules.—Adnate, pectinate, and rather broad.

Petioles.—Upper surface: non-glandular and near Yellow-Green Group 147Ain coloration. Under surface: near Yellow-Green Group 147lB incoloration, and commonly without prickles.

Leaflets.—Number: 3, 5, and 7 (most often). Shape: elliptic with acuspidate tip and an obtuse base. Size: approximately 4 to 5 cm inlength on average, and approximately 3.5 cm in width on average.Serration: uniform finely serrate (as illustrated). Texture: smooth.General appearance: very dense, medium green, and glossy foliage. Color(young foliage): Upper surface: near Yellow-Green Group 146A andbordered with anthocyanin coloration, near Greyed-Red Group 178B. Undersurface: near Yellow-Green Group 146B and widely suffused withanthocyanin coloration, near Greyed-Red Group 178B. Color (adultfoliage): Upper surface: near Yellow-Green Group 147A. Under surface:near Yellow-Green Group 146B.

Inflorescence:

Number of flowers.—Usually 6 to 15 flowers per stem.

Peduncle.—Rigid, near Yellow-Green Group 144A in coloration, medium insize, and approximately 3.5 cm in length.

Sepals.—Upper surface: tomentose, and near Yellow-Green Group 148D incoloration. Under surface: near Yellow-Green Group 146D in coloration.Configuration: commonly with some weak extensions.

Buds.—Shape: conical. Size: large. Length: approximately 2.5 cm onaverage. Color upon opening: Upper surface: Marigold Orange, near OrangeGroup 28B and 28C. Under surface: lighter Marigold Orange, near OrangeGroup 28C and 28D.

Flower.—Shape: flat cup-shaped. Diameter: commonly approximately 9 to 10cm on average. Color (when opening begins): Upper surface: MarigoldOrange, near Orange Group 28B and 28C. Under surface: lighter MarigoldOrange, near Orange Group 28C and 28D. Color (when blooming): Uppersurface: Marigold Orange, near Orange Group 28C and lightly borderedwith Persimmon Orange, Orange Group 28A. Under surface: near OrangeGroup 28D. Color (at end of opening): Upper surface: Marigold Orange,near Orange Group 28C and lightly bordered with Persimmon Orange, OrangeGroup 28D. Under surface: near Orange Group 28D. Sepals: approximately 2to 2.4 cm in length on average and approximately 0.8 cm in width onaverage. Fragrance: none. Lasting quality: long, approximately 10 dayson the plant. Petal shape: rounded base and a reflexed tip. Anthers:near Yellow-Orange Group 15A in coloration. Filaments: near Orange-RedGroup 31A in coloration. Stigmas: near Green-Yellow Group 1C incoloration. Styles: near Red Group 47C in coloration. Receptacle: nearYellow-Green Group 144A in coloration, and in longitudinal section inthe shape of a funnel. Hips: generally round in configuration,approximately 2 mm in diameter, and near Orange-Red Group 31A incoloration. Seeds: commonly approximately 14 to 15 seeds per hip onaverage, approximately 0.2 mm in size, and Yellow-Orange Group 18C incoloration.

Development:

Vegetation.—Strong.

Blooming.—Very abundant and remontant.

Resistance to diseases.—Very good with respect to Powdery Mildew.

Resistance to cold.—Has withstood a temperature of −10° C.

Resistance to drought.—If drought is prolonged some defoliation has beenobserved.

Aptitude to bear fruit.—Medium.

I claim:
 1. A new and distinct variety of Floribunda rose plantcharacterized by the following combination of characteristics: (a) Formson a very abundant and remontant basis attractive double Marigold Orangeblossoms that are relatively stable in coloration. (b) Exhibits a bushygrowth habit, (c) Forms attractive very dense medium green glossyfoliage, and (d) Is particularly well suited for growing in parks andgardens; substantially as herein shown and described.